Sliding-door lock.



I'. W. HET'TWER.

SLIDING DOOR LOGK.

APPLIMTIQN FILED JULY 19. 1910.

Patented Nov. 8; 1910.

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WITNESSES ATTO/mf ys.

W. HETTWER. SLIDING DOOR LOCK; APPLIUA'TIDN FILED JULY 19, 1910.

Patented N0v.8, 1910.

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SLIDINGr-DOOR LOCK.

Specification of Letters latent.

Patented Nov. 8, 1910.

Application led July 19, 1910. Serial No. 572,696.

To aZZ whom t may concern:

Be it known that I, FREDERICK W. HETT- wER, a citizen of the United States, and residing at Brooklyn, in the county of Kings and Sta-te of New York, have invented certain new and useful Improvements in Sliding-Door Locks, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to door locks, and particularly to looks designed for use in connection with sliding doors such as are used on street cars7 elevated railway cars, subway cars and the like; and the object thereof is to provide a lock of this class which is simple in construction and operation and which will not get out of order and frequently need repair, and the construction of which is such that the fastening of the door is automatically performed when the door is closed! the said lock being provided at each side of the door with yoke-shaped handles which are swung backwardly in the operat-ion of unfastening and opening the door, and which are also used to close the door.

My invention is an improvement on a well-known form of lock of the class specified, and is fully disclosed in the following specification of which the accompanying drawing forms a part7 in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which Figure 1 is a side view of a part of a sliding door provided with my improved lock and showing also that part of the lock which is connected with the door frame; Fig. 2 a sectional side view showing part of the door frame and part of the door and showing my improved lock, one side plate, or that part thereof which is secured to the door being removed; Fig. 3 an inside view of that part of the lock which is connected with or secured to the door frame; Fig. t a section on the line l- 4 of Fig. 1; Fig. 5 a detail view of a part of the lock which is secured to or in the door and which operates in connection with that part of the lock which is secured to or in the door frame; Fig. 6 a side view of a plate, two of which are employed in connection with that part of the lock which is secured to or in the door; Fig. 7 a

partial section on the line 7-7 of Fig. l,

and g-Fig. 8 an inside view of a detail of a spring construction shown in Figs. 2 and 4.

In the drawing forming part of this specification I have shown at a a part of a sliding door, and at Z) a part of the door frame, and in the practice of my invention I counter-sink in the face of the door frame Z) a casing c consisting of a front plate c2 and side plates c3 and provided adjacent to each end with transverse members c, and said casing c is secured in the door frame by screws c5 passed through holes c6 in the front plate thereof.

The front plate c2 of the casing c is provided with a central longitudinal slot c7, and mounted in said casing and movable between the transverse members c4 is a sliding block oZ, in the back of which is a longitudinal groove CZ?, in which is placed a screw cl3. The groove Z2 does not eXtend entirely through the block CZ, the lower lend portion of said screw being passed through a threaded aperture (Z4 in line with said groove and the upper end portion of said screw is angular in cross section and adapted to lit in a corresponding recess (Z5 in the transverse member c4 of said casing c, while the lower end portion of said screw bears on the transverse member 0*.

The block Z and screw Z3 may thus be removed from the casing c, and by turning the said screw by means of the angular upper end thereof the block Z3 may be adjusted on said screw into any desired position and said block and screw may then be returned to their position in said casing and vertically of the door frame. The block cZ is provided centrally with an outwardly directed catch Z6 having an upwardly directed nose piece cZ7.

Vithin the door a is formed an L-shaped chamber a2, the longer end Z3 of which eX- tends upwardly and the shorter member a4 of which extends and opens outwardly in the direction of the door frame, and secured to the edge of the door is a plate c rovided with an aperture c2, around which is a boss e3, and said aperture communicates with the shorter member a4 of the chamber a2 and eX- tends below the same, or is provided with a downwardly directed extension a5 adapted to receive the catch ZG of the block Z when the door is closed.

Secured to the opposite sides of the door and inclosing the ychamber a2 are lock plates f, and passing transversely through the heel portion of the chamber a and through the plates f is a bolt g, and at the point where the bolt g passes through said plates the latter are provided with conical collars oI projections f2.

My improved lock also comprises two yoke-shaped handle members It, one at each side of the door, and the lower arms of these handle members are'provided with sleeves 71,3 which enter the conical collars or projections f2, and screwed on to the inner ends of said sleeves are nuts z' which fit in corresponding recesses in the inner fa'ces of the plates f as clearly shown in Fig. 4L and are adapted'to turn in said recesses. The plates f are also provided at a predetermined point above the conical collars or projections f2 with transversely ranging and arc-shaped slots or openings y' below which are transverse curved shoulders or projections jg, in the top surfaces of which are grooves js, and the upper arms h4 of the yoke-shaped handles 7L are provided with heads h5 in which are formed sockets /LG adapted to receive the ends of a bolt 7c passed transversely through the slots or openings j, and in the operation of the door as hereinafter described the yoke-shaped arms L may be swung forwardly and backwardly and the bolt lc in this operation moves forwardly and backwardly in the slots or openings j, and mounted on said bolt and on the inner sides of the lock plates f are slide plates m, one of which is shown detached in Fig. 6, and these plates keep the slots or openings j closed at all times.

Mounted in the door between theY top end portions of the lock plates 7 is an ordinary lock a comprising a casing having a bolt n2, and this bolt is adapted to be operated by a key inserted through a key hole n3 in either side of the door, and the object of this lock and its bolt n2 is to lock the handles z, of my improved door lock against operation when the door is closed, or at any other time; but the lock n and its method of operation forms no part of my invention.

The plates fm, are movable in four keepers m2, three of which are formed on or in connection with the plates f, in the form of construction shown, and the other of which is formed on or in connection with the casing of the lock n, but these keepers may be formed in any desired manner so as to hold the plates m in proper position.

v The bolt 7c passes through the upperl end portion of an arm o, the lower end portion of which is fork-shaped in form and the separate legs thereof provided with heads o2 through which the bolt g passes and mounted on the bolt g between the side portions o3 of said arm is a bell crank lever p, one arm p2 of which ranges upwardly and the other arm p3 of which ranges outwardly, and is lefface? provided with a downwardly directed .nose p* adapted to engage the nose d? .of the catch d formed in connection with the block Z which is mounted on the screw cl3.

The upwardly directed arm 792 of the crank lever p is provided with a projection 295 adapted to lit in a corresponding recess at the upper end of the fork in the arm p3, and secured in the back of the chamber a is a casing or plates 1" as shown in detail in Figs. 2, 4L and 8, and in or to which is secured, as shown at r2, a spring r3 which is adapted to bear on the back of the upwardly directed arm p2 of the crank lever p, and another spring r4 is also secured in or to the casing or plates 1 and normally bears on one side portion of the arm 0, and serves to force said arm outwardly.

One of the lock plates f is provided with threaded bushings s, and in practice screws s2 are passed through the other lock plate and into said bushings, and this securely binds the said plates together and also binds the separate parts of the lock7 or that part thereof which is secured to or in the door together, and by taking out the screws s2 the plates f may be disconnected and detached from the door, and at the same time the separate parts of the lock may be taken out and disconnected for repair or other purposes.

The boss c3 which is formed in connection with the plate e and incloses the aperture e2 reinforces the door at this point and protects the catch Z6 of the block d, and the arm p3 of the crank level' j), and prevents injury to the door in the operation of these parts, while the casing c protects the door frame and prevents injury thereto and the plate e and lock plates f protect the door and also prevent injury thereto.

The operation will be readily understood from the foregoing description whentaken in connection with the accompanying drawing and the following statement thereof. Supposing the door to be in a closed position as shown in Fig. 2. In this position the arm p3 of the crank lever 79 engages the catch (Z6, as clearly shown in said figure. If now it is desired to open the door one of the yoke-shaped arms it is grasped from either side of the door and moved backwardly. Y This operation moves both of said kyokeshaped arms backwardly as will be readily understood, the bolt osliding in the slots or openings y', and at the same time the upper arm of the lever p is moved backwardly, the outwardly directed arm p3 of said lever is raised and disconnected from the catch d and the door may be moved backwardly and opened by the same operation.

In order to close the door all that is necessary is to grasp one of the yoke-shaped handles 7L and pull it forwardly. This operation moves the door into the closed position as shown in F ig. 2, and in this operation the nose p4 of the arm p3 of the lever p strikes the nose Z7 of the catch ZG and moves upwardly thereover and drops into the engaging position, as shown in said figure, and this operation of the lever 7? is automatic, as will be readily understood, said operation being made automatic by the spring r3.

As hereinbefore stated the slide plates m close'the transverse slots or openings j at all times and this prevents any dust or dirt from entering the lock or that part thereof which is secured to the door.

If by reason of the sagging of the door or of the door frame, or if for any other reason the catch d of that part of the lock which is secured to the door frame should need adjustment at any time, all that is necessary is to open the door and detach the casing c from the door frame and adjust the block l from the screw (Z3 as herein described.

Having fully described my invention what I claim as new, and desire to secure by Letters Patent, is gl. A lock of the class described, comprising two side plates and two vertically arranged yoke-sliaped handles, a bolt passing through said side plates and into the lower arms of said handles, a bolt passing through said side plates and into the upper arms of said handles, said last named bolt being movable in transverse slots or openings formed in said side plates, a fork shaped arm mounted on the first named bolt and through the upper end of which the other bolt passes, a crank lever mounted on the first named bolt between the side members of said arm, and provided with upwardly and outwardly directed members, and a spring for forcing said lever outwardly, said lever and said arm being provided with means for limiting said outward movement of said lever.

2. In a lock of the class described, two side plates, a bottom bolt passing through the bottom parts thereof, a top bolt passing through transverse slots in the top part of said plates and movable transversely in said slots, yoke-shaped handles mounted on the end portions of said bolts, slide plates mounted on the top bolt and adapted to close said slots, a fork-shaped arm mounted on the bottom bolt and through the upper end of which the top bolt passes, a crank lever mounted on the bottom bolt and one arm of which extends upwardly and the other outwardly, said arm and said crank lever being provided with means for limiting the outward movement of said lever, and springs for forcing said lever and said arm outwardly.

3. The combination with a sliding door of a lock device, said device consisting of two plates secured to the opposite sides of the door, a bolt passing through the bottom part of said plates-and through said door, a top bolt passing through the top portions of said plates and through said door, arcshaped handles mounted on the opposite end portions of said bolts, the top bolt being also movable backwardly and forwardly in transverse slots or openings in said plates, slide plates mounted on said bolt and adapted to close said slots or openings, a fork-shaped arm mounted on the bottom bolt and through the upper end of which the top bolt passes, a crank lever mounted on the bottom bolt between the side portions o-f said arm and provided with upwardly directed and outwardly directed members, said lever and said arm being provided with means to limit the outward movement of the crank lever, a spring for forcing said crank lever outwardly and a spring for forcing said arm outwardly.

4e. In a lock of the class described, two side plates, a bottom bolt passing through the bottom parts of said plates, a top bolt passing through transverse slots in the top part of said plates and movable transversely in said slots, handle members mounted on the end portions of said bolts, an arm mounted on the bottom bolt and through the upper end of which the top bolt passes, and a crank leverl mounted on the bottom bolt and one arm of which extends upwardly and the other outwardly, said arm and said crank lever being provided with means for limiting the outward movement of said lever, and means for forcing said lever and said arm outwardly.

5. In a lock of the class described, a catch device comprising a casing having a front plate provided with an opening, a rod removably mounted back of said plate, and a block adjustable on said rod and provided with a catch arm which extends outwardly through said opening.

In testimony that I claim the foregoing as my invention I have signed my name in presence of the subscribing witnesses this 18th day of July 1910.

FREDERICK W. HETTWER.

Vitnesses C. E. MULREANY, JosErI-I. GLANZROK. 

